pub struct OffsetSyncStore { /* private fields */ }Expand description
Accumulates OffsetSync records and translates committed source offsets to
their corresponding target offsets.
The store deliberately retains every distinct upstream anchor for its process lifetime. This conservative policy lets consumer groups that have been inactive for a long time still translate from an old anchor. A caller must clear the store when it detects that the offset-sync topic was truncated or recreated; otherwise, mappings are never expired merely due to age or the arrival of newer syncs.
Implementations§
Source§impl OffsetSyncStore
impl OffsetSyncStore
Sourcepub fn ingest(&mut self, s: OffsetSync)
pub fn ingest(&mut self, s: OffsetSync)
Ingest one offset-sync record. It replaces any prior entry for the same
(topic, partition, upstream) triple.
Sourcepub fn clear(&mut self)
pub fn clear(&mut self)
Remove all translation anchors.
Incremental readers must call this before rebuilding when any input partition cursor is no longer valid. Offset-sync topic partitions do not correspond one-to-one with the source topic-partitions stored here, so a partial reset could retain stale translations.
Sourcepub fn translate(
&self,
topic: &str,
partition: PartitionIndex,
committed: CommittedOffset,
) -> Option<DownstreamOffset>
pub fn translate( &self, topic: &str, partition: PartitionIndex, committed: CommittedOffset, ) -> Option<DownstreamOffset>
Translate a committed source offset to its target offset.
Returns None when:
- the
(topic, partition)pair has no syncs, or committedis below every known upstream offset (un-replicated data).
Trait Implementations§
Source§impl Default for OffsetSyncStore
impl Default for OffsetSyncStore
Source§fn default() -> OffsetSyncStore
fn default() -> OffsetSyncStore
Auto Trait Implementations§
impl Freeze for OffsetSyncStore
impl RefUnwindSafe for OffsetSyncStore
impl Send for OffsetSyncStore
impl Sync for OffsetSyncStore
impl Unpin for OffsetSyncStore
impl UnsafeUnpin for OffsetSyncStore
impl UnwindSafe for OffsetSyncStore
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